Active Duty to NG

[underfundedboy]

I've tried looking for information on transitioning from AD to NG with no luck. My question is a bit specific. My window to drop my packet for 18A is going to be up in a few months; however I've been looking at finishing up active duty and joining the Guard. If I'm still on AD can I apply to a NG group; get selected and begin the school pipeline while on active duty? Or do I need to wait till I leave active duty and join the NG then submit my packet?

Thanks